Given an array of size n, Find the subarray with least average of size k.
Example 1:
Input: nums = [30, 20, 10], k = 1
Output: 3
Explanation: Subarrays of length 1 are
{30}, {20}, {10}. {10} has the least
average.
Example 2:
Input: nums = [30, 20, 10], k = 2
Output: 2
Explanation: Subarrays of length 2 are
{30, 20}, {20, 10}. {20, 10} has the least
average.
Your Task:
You don't need to read or print anything. Yous task is to complete the function least_average() which takes the array and k as input parameter and returns the index of the first element of the subarray(1-based indexing) of size k that has least average.
Expected Time Complexity: O(n) Expected Space Compelxity: O(1)
Constraints:
1 <= k <= n <= 100000
1 <= elements of array <= 1000000
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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